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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-kernel.git] / drivers / isdn / mISDN / tei.c
1 /*
2 *
3 * Author Karsten Keil <kkeil@novell.com>
4 *
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17 #include "layer2.h"
18 #include <linux/random.h>
19 #include <linux/slab.h>
20 #include "core.h"
21
22 #define ID_REQUEST 1
23 #define ID_ASSIGNED 2
24 #define ID_DENIED 3
25 #define ID_CHK_REQ 4
26 #define ID_CHK_RES 5
27 #define ID_REMOVE 6
28 #define ID_VERIFY 7
29
30 #define TEI_ENTITY_ID 0xf
31
32 #define MGR_PH_ACTIVE 16
33 #define MGR_PH_NOTREADY 17
34
35 #define DATIMER_VAL 10000
36
37 static u_int *debug;
38
39 static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL};
40 static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL};
41 static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL};
42
43 enum {
44 ST_L1_DEACT,
45 ST_L1_DEACT_PENDING,
46 ST_L1_ACTIV,
47 };
48 #define DEACT_STATE_COUNT (ST_L1_ACTIV + 1)
49
50 static char *strDeactState[] =
51 {
52 "ST_L1_DEACT",
53 "ST_L1_DEACT_PENDING",
54 "ST_L1_ACTIV",
55 };
56
57 enum {
58 EV_ACTIVATE,
59 EV_ACTIVATE_IND,
60 EV_DEACTIVATE,
61 EV_DEACTIVATE_IND,
62 EV_UI,
63 EV_DATIMER,
64 };
65
66 #define DEACT_EVENT_COUNT (EV_DATIMER + 1)
67
68 static char *strDeactEvent[] =
69 {
70 "EV_ACTIVATE",
71 "EV_ACTIVATE_IND",
72 "EV_DEACTIVATE",
73 "EV_DEACTIVATE_IND",
74 "EV_UI",
75 "EV_DATIMER",
76 };
77
78 static void
79 da_debug(struct FsmInst *fi, char *fmt, ...)
80 {
81 struct manager *mgr = fi->userdata;
82 struct va_format vaf;
83 va_list va;
84
85 if (!(*debug & DEBUG_L2_TEIFSM))
86 return;
87
88 va_start(va, fmt);
89
90 vaf.fmt = fmt;
91 vaf.va = &va;
92
93 printk(KERN_DEBUG "mgr(%d): %pV\n", mgr->ch.st->dev->id, &vaf);
94
95 va_end(va);
96 }
97
98 static void
99 da_activate(struct FsmInst *fi, int event, void *arg)
100 {
101 struct manager *mgr = fi->userdata;
102
103 if (fi->state == ST_L1_DEACT_PENDING)
104 mISDN_FsmDelTimer(&mgr->datimer, 1);
105 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
106 }
107
108 static void
109 da_deactivate_ind(struct FsmInst *fi, int event, void *arg)
110 {
111 mISDN_FsmChangeState(fi, ST_L1_DEACT);
112 }
113
114 static void
115 da_deactivate(struct FsmInst *fi, int event, void *arg)
116 {
117 struct manager *mgr = fi->userdata;
118 struct layer2 *l2;
119 u_long flags;
120
121 read_lock_irqsave(&mgr->lock, flags);
122 list_for_each_entry(l2, &mgr->layer2, list) {
123 if (l2->l2m.state > ST_L2_4) {
124 /* have still activ TEI */
125 read_unlock_irqrestore(&mgr->lock, flags);
126 return;
127 }
128 }
129 read_unlock_irqrestore(&mgr->lock, flags);
130 /* All TEI are inactiv */
131 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
132 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
133 NULL, 1);
134 mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
135 }
136 }
137
138 static void
139 da_ui(struct FsmInst *fi, int event, void *arg)
140 {
141 struct manager *mgr = fi->userdata;
142
143 /* restart da timer */
144 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
145 mISDN_FsmDelTimer(&mgr->datimer, 2);
146 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
147 NULL, 2);
148 }
149 }
150
151 static void
152 da_timer(struct FsmInst *fi, int event, void *arg)
153 {
154 struct manager *mgr = fi->userdata;
155 struct layer2 *l2;
156 u_long flags;
157
158 /* check again */
159 read_lock_irqsave(&mgr->lock, flags);
160 list_for_each_entry(l2, &mgr->layer2, list) {
161 if (l2->l2m.state > ST_L2_4) {
162 /* have still activ TEI */
163 read_unlock_irqrestore(&mgr->lock, flags);
164 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
165 return;
166 }
167 }
168 read_unlock_irqrestore(&mgr->lock, flags);
169 /* All TEI are inactiv */
170 mISDN_FsmChangeState(fi, ST_L1_DEACT);
171 _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL,
172 GFP_ATOMIC);
173 }
174
175 static struct FsmNode DeactFnList[] =
176 {
177 {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate},
178 {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind},
179 {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate},
180 {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate},
181 {ST_L1_DEACT_PENDING, EV_UI, da_ui},
182 {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer},
183 };
184
185 enum {
186 ST_TEI_NOP,
187 ST_TEI_IDREQ,
188 ST_TEI_IDVERIFY,
189 };
190
191 #define TEI_STATE_COUNT (ST_TEI_IDVERIFY + 1)
192
193 static char *strTeiState[] =
194 {
195 "ST_TEI_NOP",
196 "ST_TEI_IDREQ",
197 "ST_TEI_IDVERIFY",
198 };
199
200 enum {
201 EV_IDREQ,
202 EV_ASSIGN,
203 EV_ASSIGN_REQ,
204 EV_DENIED,
205 EV_CHKREQ,
206 EV_CHKRESP,
207 EV_REMOVE,
208 EV_VERIFY,
209 EV_TIMER,
210 };
211
212 #define TEI_EVENT_COUNT (EV_TIMER + 1)
213
214 static char *strTeiEvent[] =
215 {
216 "EV_IDREQ",
217 "EV_ASSIGN",
218 "EV_ASSIGN_REQ",
219 "EV_DENIED",
220 "EV_CHKREQ",
221 "EV_CHKRESP",
222 "EV_REMOVE",
223 "EV_VERIFY",
224 "EV_TIMER",
225 };
226
227 static void
228 tei_debug(struct FsmInst *fi, char *fmt, ...)
229 {
230 struct teimgr *tm = fi->userdata;
231 struct va_format vaf;
232 va_list va;
233
234 if (!(*debug & DEBUG_L2_TEIFSM))
235 return;
236
237 va_start(va, fmt);
238
239 vaf.fmt = fmt;
240 vaf.va = &va;
241
242 printk(KERN_DEBUG "sapi(%d) tei(%d): %pV\n",
243 tm->l2->sapi, tm->l2->tei, &vaf);
244
245 va_end(va);
246 }
247
248
249
250 static int
251 get_free_id(struct manager *mgr)
252 {
253 DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 };
254 int i;
255 struct layer2 *l2;
256
257 list_for_each_entry(l2, &mgr->layer2, list) {
258 if (l2->ch.nr > 63) {
259 printk(KERN_WARNING
260 "%s: more as 63 layer2 for one device\n",
261 __func__);
262 return -EBUSY;
263 }
264 __set_bit(l2->ch.nr, ids);
265 }
266 i = find_next_zero_bit(ids, 64, 1);
267 if (i < 64)
268 return i;
269 printk(KERN_WARNING "%s: more as 63 layer2 for one device\n",
270 __func__);
271 return -EBUSY;
272 }
273
274 static int
275 get_free_tei(struct manager *mgr)
276 {
277 DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 };
278 int i;
279 struct layer2 *l2;
280
281 list_for_each_entry(l2, &mgr->layer2, list) {
282 if (l2->ch.nr == 0)
283 continue;
284 if ((l2->ch.addr & 0xff) != 0)
285 continue;
286 i = l2->ch.addr >> 8;
287 if (i < 64)
288 continue;
289 i -= 64;
290
291 __set_bit(i, ids);
292 }
293 i = find_first_zero_bit(ids, 64);
294 if (i < 64)
295 return i + 64;
296 printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n",
297 __func__);
298 return -1;
299 }
300
301 static void
302 teiup_create(struct manager *mgr, u_int prim, int len, void *arg)
303 {
304 struct sk_buff *skb;
305 struct mISDNhead *hh;
306 int err;
307
308 skb = mI_alloc_skb(len, GFP_ATOMIC);
309 if (!skb)
310 return;
311 hh = mISDN_HEAD_P(skb);
312 hh->prim = prim;
313 hh->id = (mgr->ch.nr << 16) | mgr->ch.addr;
314 if (len)
315 skb_put_data(skb, arg, len);
316 err = mgr->up->send(mgr->up, skb);
317 if (err) {
318 printk(KERN_WARNING "%s: err=%d\n", __func__, err);
319 dev_kfree_skb(skb);
320 }
321 }
322
323 static u_int
324 new_id(struct manager *mgr)
325 {
326 u_int id;
327
328 id = mgr->nextid++;
329 if (id == 0x7fff)
330 mgr->nextid = 1;
331 id <<= 16;
332 id |= GROUP_TEI << 8;
333 id |= TEI_SAPI;
334 return id;
335 }
336
337 static void
338 do_send(struct manager *mgr)
339 {
340 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
341 return;
342
343 if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) {
344 struct sk_buff *skb = skb_dequeue(&mgr->sendq);
345
346 if (!skb) {
347 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
348 return;
349 }
350 mgr->lastid = mISDN_HEAD_ID(skb);
351 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
352 if (mgr->ch.recv(mgr->ch.peer, skb)) {
353 dev_kfree_skb(skb);
354 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
355 mgr->lastid = MISDN_ID_NONE;
356 }
357 }
358 }
359
360 static void
361 do_ack(struct manager *mgr, u_int id)
362 {
363 if (test_bit(MGR_PH_NOTREADY, &mgr->options)) {
364 if (id == mgr->lastid) {
365 if (test_bit(MGR_PH_ACTIVE, &mgr->options)) {
366 struct sk_buff *skb;
367
368 skb = skb_dequeue(&mgr->sendq);
369 if (skb) {
370 mgr->lastid = mISDN_HEAD_ID(skb);
371 if (!mgr->ch.recv(mgr->ch.peer, skb))
372 return;
373 dev_kfree_skb(skb);
374 }
375 }
376 mgr->lastid = MISDN_ID_NONE;
377 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
378 }
379 }
380 }
381
382 static void
383 mgr_send_down(struct manager *mgr, struct sk_buff *skb)
384 {
385 skb_queue_tail(&mgr->sendq, skb);
386 if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) {
387 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
388 NULL, GFP_KERNEL);
389 } else {
390 do_send(mgr);
391 }
392 }
393
394 static int
395 dl_unit_data(struct manager *mgr, struct sk_buff *skb)
396 {
397 if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */
398 return -EINVAL;
399 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
400 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
401 NULL, GFP_KERNEL);
402 skb_push(skb, 3);
403 skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */
404 skb->data[1] = 0xff; /* TEI 127 */
405 skb->data[2] = UI; /* UI frame */
406 mISDN_HEAD_PRIM(skb) = PH_DATA_REQ;
407 mISDN_HEAD_ID(skb) = new_id(mgr);
408 skb_queue_tail(&mgr->sendq, skb);
409 do_send(mgr);
410 return 0;
411 }
412
413 static unsigned int
414 random_ri(void)
415 {
416 u16 x;
417
418 get_random_bytes(&x, sizeof(x));
419 return x;
420 }
421
422 static struct layer2 *
423 findtei(struct manager *mgr, int tei)
424 {
425 struct layer2 *l2;
426 u_long flags;
427
428 read_lock_irqsave(&mgr->lock, flags);
429 list_for_each_entry(l2, &mgr->layer2, list) {
430 if ((l2->sapi == 0) && (l2->tei > 0) &&
431 (l2->tei != GROUP_TEI) && (l2->tei == tei))
432 goto done;
433 }
434 l2 = NULL;
435 done:
436 read_unlock_irqrestore(&mgr->lock, flags);
437 return l2;
438 }
439
440 static void
441 put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei)
442 {
443 struct sk_buff *skb;
444 u_char bp[8];
445
446 bp[0] = (TEI_SAPI << 2);
447 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
448 bp[0] |= 2; /* CR:=1 for net command */
449 bp[1] = (GROUP_TEI << 1) | 0x1;
450 bp[2] = UI;
451 bp[3] = TEI_ENTITY_ID;
452 bp[4] = ri >> 8;
453 bp[5] = ri & 0xff;
454 bp[6] = m_id;
455 bp[7] = ((tei << 1) & 0xff) | 1;
456 skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC);
457 if (!skb) {
458 printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
459 return;
460 }
461 mgr_send_down(mgr, skb);
462 }
463
464 static void
465 tei_id_request(struct FsmInst *fi, int event, void *arg)
466 {
467 struct teimgr *tm = fi->userdata;
468
469 if (tm->l2->tei != GROUP_TEI) {
470 tm->tei_m.printdebug(&tm->tei_m,
471 "assign request for already assigned tei %d",
472 tm->l2->tei);
473 return;
474 }
475 tm->ri = random_ri();
476 if (*debug & DEBUG_L2_TEI)
477 tm->tei_m.printdebug(&tm->tei_m,
478 "assign request ri %d", tm->ri);
479 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
480 mISDN_FsmChangeState(fi, ST_TEI_IDREQ);
481 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1);
482 tm->nval = 3;
483 }
484
485 static void
486 tei_id_assign(struct FsmInst *fi, int event, void *arg)
487 {
488 struct teimgr *tm = fi->userdata;
489 struct layer2 *l2;
490 u_char *dp = arg;
491 int ri, tei;
492
493 ri = ((unsigned int) *dp++ << 8);
494 ri += *dp++;
495 dp++;
496 tei = *dp >> 1;
497 if (*debug & DEBUG_L2_TEI)
498 tm->tei_m.printdebug(fi, "identity assign ri %d tei %d",
499 ri, tei);
500 l2 = findtei(tm->mgr, tei);
501 if (l2) { /* same tei is in use */
502 if (ri != l2->tm->ri) {
503 tm->tei_m.printdebug(fi,
504 "possible duplicate assignment tei %d", tei);
505 tei_l2(l2, MDL_ERROR_RSP, 0);
506 }
507 } else if (ri == tm->ri) {
508 mISDN_FsmDelTimer(&tm->timer, 1);
509 mISDN_FsmChangeState(fi, ST_TEI_NOP);
510 tei_l2(tm->l2, MDL_ASSIGN_REQ, tei);
511 }
512 }
513
514 static void
515 tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
516 {
517 struct teimgr *tm = fi->userdata;
518 struct layer2 *l2;
519 u_char *dp = arg;
520 int tei, ri;
521
522 ri = ((unsigned int) *dp++ << 8);
523 ri += *dp++;
524 dp++;
525 tei = *dp >> 1;
526 if (*debug & DEBUG_L2_TEI)
527 tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d",
528 ri, tei);
529 l2 = findtei(tm->mgr, tei);
530 if (l2) { /* same tei is in use */
531 if (ri != l2->tm->ri) { /* and it wasn't our request */
532 tm->tei_m.printdebug(fi,
533 "possible duplicate assignment tei %d", tei);
534 mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL);
535 }
536 }
537 }
538
539 static void
540 tei_id_denied(struct FsmInst *fi, int event, void *arg)
541 {
542 struct teimgr *tm = fi->userdata;
543 u_char *dp = arg;
544 int ri, tei;
545
546 ri = ((unsigned int) *dp++ << 8);
547 ri += *dp++;
548 dp++;
549 tei = *dp >> 1;
550 if (*debug & DEBUG_L2_TEI)
551 tm->tei_m.printdebug(fi, "identity denied ri %d tei %d",
552 ri, tei);
553 }
554
555 static void
556 tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
557 {
558 struct teimgr *tm = fi->userdata;
559 u_char *dp = arg;
560 int tei;
561
562 tei = *(dp + 3) >> 1;
563 if (*debug & DEBUG_L2_TEI)
564 tm->tei_m.printdebug(fi, "identity check req tei %d", tei);
565 if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) ||
566 (tei == tm->l2->tei))) {
567 mISDN_FsmDelTimer(&tm->timer, 4);
568 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
569 put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei);
570 }
571 }
572
573 static void
574 tei_id_remove(struct FsmInst *fi, int event, void *arg)
575 {
576 struct teimgr *tm = fi->userdata;
577 u_char *dp = arg;
578 int tei;
579
580 tei = *(dp + 3) >> 1;
581 if (*debug & DEBUG_L2_TEI)
582 tm->tei_m.printdebug(fi, "identity remove tei %d", tei);
583 if ((tm->l2->tei != GROUP_TEI) &&
584 ((tei == GROUP_TEI) || (tei == tm->l2->tei))) {
585 mISDN_FsmDelTimer(&tm->timer, 5);
586 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
587 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
588 }
589 }
590
591 static void
592 tei_id_verify(struct FsmInst *fi, int event, void *arg)
593 {
594 struct teimgr *tm = fi->userdata;
595
596 if (*debug & DEBUG_L2_TEI)
597 tm->tei_m.printdebug(fi, "id verify request for tei %d",
598 tm->l2->tei);
599 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
600 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
601 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
602 tm->nval = 2;
603 }
604
605 static void
606 tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
607 {
608 struct teimgr *tm = fi->userdata;
609
610 if (--tm->nval) {
611 tm->ri = random_ri();
612 if (*debug & DEBUG_L2_TEI)
613 tm->tei_m.printdebug(fi, "assign req(%d) ri %d",
614 4 - tm->nval, tm->ri);
615 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
616 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3);
617 } else {
618 tm->tei_m.printdebug(fi, "assign req failed");
619 tei_l2(tm->l2, MDL_ERROR_RSP, 0);
620 mISDN_FsmChangeState(fi, ST_TEI_NOP);
621 }
622 }
623
624 static void
625 tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
626 {
627 struct teimgr *tm = fi->userdata;
628
629 if (--tm->nval) {
630 if (*debug & DEBUG_L2_TEI)
631 tm->tei_m.printdebug(fi,
632 "id verify req(%d) for tei %d",
633 3 - tm->nval, tm->l2->tei);
634 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
635 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
636 } else {
637 tm->tei_m.printdebug(fi, "verify req for tei %d failed",
638 tm->l2->tei);
639 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
640 mISDN_FsmChangeState(fi, ST_TEI_NOP);
641 }
642 }
643
644 static struct FsmNode TeiFnListUser[] =
645 {
646 {ST_TEI_NOP, EV_IDREQ, tei_id_request},
647 {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
648 {ST_TEI_NOP, EV_VERIFY, tei_id_verify},
649 {ST_TEI_NOP, EV_REMOVE, tei_id_remove},
650 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
651 {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout},
652 {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
653 {ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
654 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout},
655 {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
656 {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
657 };
658
659 static void
660 tei_l2remove(struct layer2 *l2)
661 {
662 put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei);
663 tei_l2(l2, MDL_REMOVE_REQ, 0);
664 list_del(&l2->ch.list);
665 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
666 }
667
668 static void
669 tei_assign_req(struct FsmInst *fi, int event, void *arg)
670 {
671 struct teimgr *tm = fi->userdata;
672 u_char *dp = arg;
673
674 if (tm->l2->tei == GROUP_TEI) {
675 tm->tei_m.printdebug(&tm->tei_m,
676 "net tei assign request without tei");
677 return;
678 }
679 tm->ri = ((unsigned int) *dp++ << 8);
680 tm->ri += *dp++;
681 if (*debug & DEBUG_L2_TEI)
682 tm->tei_m.printdebug(&tm->tei_m,
683 "net assign request ri %d teim %d", tm->ri, *dp);
684 put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei);
685 mISDN_FsmChangeState(fi, ST_TEI_NOP);
686 }
687
688 static void
689 tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg)
690 {
691 struct teimgr *tm = fi->userdata;
692
693 if (*debug & DEBUG_L2_TEI)
694 tm->tei_m.printdebug(fi, "id check request for tei %d",
695 tm->l2->tei);
696 tm->rcnt = 0;
697 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
698 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
699 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
700 tm->nval = 2;
701 }
702
703 static void
704 tei_id_chk_resp(struct FsmInst *fi, int event, void *arg)
705 {
706 struct teimgr *tm = fi->userdata;
707 u_char *dp = arg;
708 int tei;
709
710 tei = dp[3] >> 1;
711 if (*debug & DEBUG_L2_TEI)
712 tm->tei_m.printdebug(fi, "identity check resp tei %d", tei);
713 if (tei == tm->l2->tei)
714 tm->rcnt++;
715 }
716
717 static void
718 tei_id_verify_net(struct FsmInst *fi, int event, void *arg)
719 {
720 struct teimgr *tm = fi->userdata;
721 u_char *dp = arg;
722 int tei;
723
724 tei = dp[3] >> 1;
725 if (*debug & DEBUG_L2_TEI)
726 tm->tei_m.printdebug(fi, "identity verify req tei %d/%d",
727 tei, tm->l2->tei);
728 if (tei == tm->l2->tei)
729 tei_id_chk_req_net(fi, event, arg);
730 }
731
732 static void
733 tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg)
734 {
735 struct teimgr *tm = fi->userdata;
736
737 if (tm->rcnt == 1) {
738 if (*debug & DEBUG_L2_TEI)
739 tm->tei_m.printdebug(fi,
740 "check req for tei %d successful\n", tm->l2->tei);
741 mISDN_FsmChangeState(fi, ST_TEI_NOP);
742 } else if (tm->rcnt > 1) {
743 /* duplicate assignment; remove */
744 tei_l2remove(tm->l2);
745 } else if (--tm->nval) {
746 if (*debug & DEBUG_L2_TEI)
747 tm->tei_m.printdebug(fi,
748 "id check req(%d) for tei %d",
749 3 - tm->nval, tm->l2->tei);
750 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
751 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
752 } else {
753 tm->tei_m.printdebug(fi, "check req for tei %d failed",
754 tm->l2->tei);
755 mISDN_FsmChangeState(fi, ST_TEI_NOP);
756 tei_l2remove(tm->l2);
757 }
758 }
759
760 static struct FsmNode TeiFnListNet[] =
761 {
762 {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req},
763 {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net},
764 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net},
765 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net},
766 {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp},
767 };
768
769 static void
770 tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
771 {
772 if (test_bit(FLG_FIXED_TEI, &tm->l2->flag))
773 return;
774 if (*debug & DEBUG_L2_TEI)
775 tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt);
776 if (mt == ID_ASSIGNED)
777 mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp);
778 else if (mt == ID_DENIED)
779 mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp);
780 else if (mt == ID_CHK_REQ)
781 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp);
782 else if (mt == ID_REMOVE)
783 mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp);
784 else if (mt == ID_VERIFY)
785 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp);
786 else if (mt == ID_CHK_RES)
787 mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp);
788 }
789
790 static struct layer2 *
791 create_new_tei(struct manager *mgr, int tei, int sapi)
792 {
793 unsigned long opt = 0;
794 unsigned long flags;
795 int id;
796 struct layer2 *l2;
797 struct channel_req rq;
798
799 if (!mgr->up)
800 return NULL;
801 if ((tei >= 0) && (tei < 64))
802 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
803 if (mgr->ch.st->dev->Dprotocols & ((1 << ISDN_P_TE_E1) |
804 (1 << ISDN_P_NT_E1))) {
805 test_and_set_bit(OPTION_L2_PMX, &opt);
806 rq.protocol = ISDN_P_NT_E1;
807 } else {
808 rq.protocol = ISDN_P_NT_S0;
809 }
810 l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi);
811 if (!l2) {
812 printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
813 return NULL;
814 }
815 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
816 if (!l2->tm) {
817 kfree(l2);
818 printk(KERN_WARNING "%s:no memory for teimgr\n", __func__);
819 return NULL;
820 }
821 l2->tm->mgr = mgr;
822 l2->tm->l2 = l2;
823 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
824 l2->tm->tei_m.userdata = l2->tm;
825 l2->tm->tei_m.printdebug = tei_debug;
826 l2->tm->tei_m.fsm = &teifsmn;
827 l2->tm->tei_m.state = ST_TEI_NOP;
828 l2->tm->tval = 2000; /* T202 2 sec */
829 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
830 write_lock_irqsave(&mgr->lock, flags);
831 id = get_free_id(mgr);
832 list_add_tail(&l2->list, &mgr->layer2);
833 write_unlock_irqrestore(&mgr->lock, flags);
834 if (id < 0) {
835 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
836 printk(KERN_WARNING "%s:no free id\n", __func__);
837 return NULL;
838 } else {
839 l2->ch.nr = id;
840 __add_layer2(&l2->ch, mgr->ch.st);
841 l2->ch.recv = mgr->ch.recv;
842 l2->ch.peer = mgr->ch.peer;
843 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
844 /* We need open here L1 for the manager as well (refcounting) */
845 rq.adr.dev = mgr->ch.st->dev->id;
846 id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL, &rq);
847 if (id < 0) {
848 printk(KERN_WARNING "%s: cannot open L1\n", __func__);
849 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
850 l2 = NULL;
851 }
852 }
853 return l2;
854 }
855
856 static void
857 new_tei_req(struct manager *mgr, u_char *dp)
858 {
859 int tei, ri;
860 struct layer2 *l2;
861
862 ri = dp[0] << 8;
863 ri += dp[1];
864 if (!mgr->up)
865 goto denied;
866 if (!(dp[3] & 1)) /* Extension bit != 1 */
867 goto denied;
868 if (dp[3] != 0xff)
869 tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */
870 else
871 tei = get_free_tei(mgr);
872 if (tei < 0) {
873 printk(KERN_WARNING "%s:No free tei\n", __func__);
874 goto denied;
875 }
876 l2 = create_new_tei(mgr, tei, CTRL_SAPI);
877 if (!l2)
878 goto denied;
879 else
880 mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp);
881 return;
882 denied:
883 put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI);
884 }
885
886 static int
887 ph_data_ind(struct manager *mgr, struct sk_buff *skb)
888 {
889 int ret = -EINVAL;
890 struct layer2 *l2, *nl2;
891 u_char mt;
892
893 if (skb->len < 8) {
894 if (*debug & DEBUG_L2_TEI)
895 printk(KERN_DEBUG "%s: short mgr frame %d/8\n",
896 __func__, skb->len);
897 goto done;
898 }
899
900 if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */
901 goto done;
902 if (skb->data[0] & 1) /* EA0 formal error */
903 goto done;
904 if (!(skb->data[1] & 1)) /* EA1 formal error */
905 goto done;
906 if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */
907 goto done;
908 if ((skb->data[2] & 0xef) != UI) /* not UI */
909 goto done;
910 if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */
911 goto done;
912 mt = skb->data[6];
913 switch (mt) {
914 case ID_REQUEST:
915 case ID_CHK_RES:
916 case ID_VERIFY:
917 if (!test_bit(MGR_OPT_NETWORK, &mgr->options))
918 goto done;
919 break;
920 case ID_ASSIGNED:
921 case ID_DENIED:
922 case ID_CHK_REQ:
923 case ID_REMOVE:
924 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
925 goto done;
926 break;
927 default:
928 goto done;
929 }
930 ret = 0;
931 if (mt == ID_REQUEST) {
932 new_tei_req(mgr, &skb->data[4]);
933 goto done;
934 }
935 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
936 tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4);
937 }
938 done:
939 return ret;
940 }
941
942 int
943 l2_tei(struct layer2 *l2, u_int cmd, u_long arg)
944 {
945 struct teimgr *tm = l2->tm;
946
947 if (test_bit(FLG_FIXED_TEI, &l2->flag))
948 return 0;
949 if (*debug & DEBUG_L2_TEI)
950 printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
951 switch (cmd) {
952 case MDL_ASSIGN_IND:
953 mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL);
954 break;
955 case MDL_ERROR_IND:
956 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
957 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei);
958 if (test_bit(MGR_OPT_USER, &tm->mgr->options))
959 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL);
960 break;
961 case MDL_STATUS_UP_IND:
962 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
963 mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL);
964 break;
965 case MDL_STATUS_DOWN_IND:
966 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
967 mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL);
968 break;
969 case MDL_STATUS_UI_IND:
970 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
971 mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL);
972 break;
973 }
974 return 0;
975 }
976
977 void
978 TEIrelease(struct layer2 *l2)
979 {
980 struct teimgr *tm = l2->tm;
981 u_long flags;
982
983 mISDN_FsmDelTimer(&tm->timer, 1);
984 write_lock_irqsave(&tm->mgr->lock, flags);
985 list_del(&l2->list);
986 write_unlock_irqrestore(&tm->mgr->lock, flags);
987 l2->tm = NULL;
988 kfree(tm);
989 }
990
991 static int
992 create_teimgr(struct manager *mgr, struct channel_req *crq)
993 {
994 struct layer2 *l2;
995 unsigned long opt = 0;
996 unsigned long flags;
997 int id;
998 struct channel_req l1rq;
999
1000 if (*debug & DEBUG_L2_TEI)
1001 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
1002 __func__, dev_name(&mgr->ch.st->dev->dev),
1003 crq->protocol, crq->adr.dev, crq->adr.channel,
1004 crq->adr.sapi, crq->adr.tei);
1005 if (crq->adr.tei > GROUP_TEI)
1006 return -EINVAL;
1007 if (crq->adr.tei < 64)
1008 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
1009 if (crq->adr.tei == 0)
1010 test_and_set_bit(OPTION_L2_PTP, &opt);
1011 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1012 if (crq->protocol == ISDN_P_LAPD_TE)
1013 return -EPROTONOSUPPORT;
1014 if ((crq->adr.tei != 0) && (crq->adr.tei != 127))
1015 return -EINVAL;
1016 if (mgr->up) {
1017 printk(KERN_WARNING
1018 "%s: only one network manager is allowed\n",
1019 __func__);
1020 return -EBUSY;
1021 }
1022 } else if (test_bit(MGR_OPT_USER, &mgr->options)) {
1023 if (crq->protocol == ISDN_P_LAPD_NT)
1024 return -EPROTONOSUPPORT;
1025 if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI))
1026 return -EINVAL; /* dyn tei */
1027 } else {
1028 if (crq->protocol == ISDN_P_LAPD_NT)
1029 test_and_set_bit(MGR_OPT_NETWORK, &mgr->options);
1030 if (crq->protocol == ISDN_P_LAPD_TE)
1031 test_and_set_bit(MGR_OPT_USER, &mgr->options);
1032 }
1033 l1rq.adr = crq->adr;
1034 if (mgr->ch.st->dev->Dprotocols
1035 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
1036 test_and_set_bit(OPTION_L2_PMX, &opt);
1037 if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) {
1038 mgr->up = crq->ch;
1039 id = DL_INFO_L2_CONNECT;
1040 teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id);
1041 if (test_bit(MGR_PH_ACTIVE, &mgr->options))
1042 teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL);
1043 crq->ch = NULL;
1044 if (!list_empty(&mgr->layer2)) {
1045 read_lock_irqsave(&mgr->lock, flags);
1046 list_for_each_entry(l2, &mgr->layer2, list) {
1047 l2->up = mgr->up;
1048 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
1049 }
1050 read_unlock_irqrestore(&mgr->lock, flags);
1051 }
1052 return 0;
1053 }
1054 l2 = create_l2(crq->ch, crq->protocol, opt,
1055 crq->adr.tei, crq->adr.sapi);
1056 if (!l2)
1057 return -ENOMEM;
1058 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
1059 if (!l2->tm) {
1060 kfree(l2);
1061 printk(KERN_ERR "kmalloc teimgr failed\n");
1062 return -ENOMEM;
1063 }
1064 l2->tm->mgr = mgr;
1065 l2->tm->l2 = l2;
1066 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
1067 l2->tm->tei_m.userdata = l2->tm;
1068 l2->tm->tei_m.printdebug = tei_debug;
1069 if (crq->protocol == ISDN_P_LAPD_TE) {
1070 l2->tm->tei_m.fsm = &teifsmu;
1071 l2->tm->tei_m.state = ST_TEI_NOP;
1072 l2->tm->tval = 1000; /* T201 1 sec */
1073 if (test_bit(OPTION_L2_PMX, &opt))
1074 l1rq.protocol = ISDN_P_TE_E1;
1075 else
1076 l1rq.protocol = ISDN_P_TE_S0;
1077 } else {
1078 l2->tm->tei_m.fsm = &teifsmn;
1079 l2->tm->tei_m.state = ST_TEI_NOP;
1080 l2->tm->tval = 2000; /* T202 2 sec */
1081 if (test_bit(OPTION_L2_PMX, &opt))
1082 l1rq.protocol = ISDN_P_NT_E1;
1083 else
1084 l1rq.protocol = ISDN_P_NT_S0;
1085 }
1086 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
1087 write_lock_irqsave(&mgr->lock, flags);
1088 id = get_free_id(mgr);
1089 list_add_tail(&l2->list, &mgr->layer2);
1090 write_unlock_irqrestore(&mgr->lock, flags);
1091 if (id >= 0) {
1092 l2->ch.nr = id;
1093 l2->up->nr = id;
1094 crq->ch = &l2->ch;
1095 /* We need open here L1 for the manager as well (refcounting) */
1096 id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL,
1097 &l1rq);
1098 }
1099 if (id < 0)
1100 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1101 return id;
1102 }
1103
1104 static int
1105 mgr_send(struct mISDNchannel *ch, struct sk_buff *skb)
1106 {
1107 struct manager *mgr;
1108 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1109 int ret = -EINVAL;
1110
1111 mgr = container_of(ch, struct manager, ch);
1112 if (*debug & DEBUG_L2_RECV)
1113 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1114 __func__, hh->prim, hh->id);
1115 switch (hh->prim) {
1116 case PH_DATA_IND:
1117 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
1118 ret = ph_data_ind(mgr, skb);
1119 break;
1120 case PH_DATA_CNF:
1121 do_ack(mgr, hh->id);
1122 ret = 0;
1123 break;
1124 case PH_ACTIVATE_IND:
1125 test_and_set_bit(MGR_PH_ACTIVE, &mgr->options);
1126 if (mgr->up)
1127 teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL);
1128 mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL);
1129 do_send(mgr);
1130 ret = 0;
1131 break;
1132 case PH_DEACTIVATE_IND:
1133 test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options);
1134 if (mgr->up)
1135 teiup_create(mgr, PH_DEACTIVATE_IND, 0, NULL);
1136 mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL);
1137 ret = 0;
1138 break;
1139 case DL_UNITDATA_REQ:
1140 return dl_unit_data(mgr, skb);
1141 }
1142 if (!ret)
1143 dev_kfree_skb(skb);
1144 return ret;
1145 }
1146
1147 static int
1148 free_teimanager(struct manager *mgr)
1149 {
1150 struct layer2 *l2, *nl2;
1151
1152 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1153 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1154 /* not locked lock is taken in release tei */
1155 mgr->up = NULL;
1156 if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) {
1157 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1158 put_tei_msg(mgr, ID_REMOVE, 0, l2->tei);
1159 mutex_lock(&mgr->ch.st->lmutex);
1160 list_del(&l2->ch.list);
1161 mutex_unlock(&mgr->ch.st->lmutex);
1162 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1163 }
1164 test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options);
1165 } else {
1166 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1167 l2->up = NULL;
1168 }
1169 }
1170 }
1171 if (test_bit(MGR_OPT_USER, &mgr->options)) {
1172 if (list_empty(&mgr->layer2))
1173 test_and_clear_bit(MGR_OPT_USER, &mgr->options);
1174 }
1175 mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL);
1176 return 0;
1177 }
1178
1179 static int
1180 ctrl_teimanager(struct manager *mgr, void *arg)
1181 {
1182 /* currently we only have one option */
1183 int *val = (int *)arg;
1184 int ret = 0;
1185
1186 switch (val[0]) {
1187 case IMCLEAR_L2:
1188 if (val[1])
1189 test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
1190 else
1191 test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
1192 break;
1193 case IMHOLD_L1:
1194 if (val[1])
1195 test_and_set_bit(OPTION_L1_HOLD, &mgr->options);
1196 else
1197 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1198 break;
1199 default:
1200 ret = -EINVAL;
1201 }
1202 return ret;
1203 }
1204
1205 /* This function does create a L2 for fixed TEI in NT Mode */
1206 static int
1207 check_data(struct manager *mgr, struct sk_buff *skb)
1208 {
1209 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1210 int ret, tei, sapi;
1211 struct layer2 *l2;
1212
1213 if (*debug & DEBUG_L2_CTRL)
1214 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1215 __func__, hh->prim, hh->id);
1216 if (test_bit(MGR_OPT_USER, &mgr->options))
1217 return -ENOTCONN;
1218 if (hh->prim != PH_DATA_IND)
1219 return -ENOTCONN;
1220 if (skb->len != 3)
1221 return -ENOTCONN;
1222 if (skb->data[0] & 3) /* EA0 and CR must be 0 */
1223 return -EINVAL;
1224 sapi = skb->data[0] >> 2;
1225 if (!(skb->data[1] & 1)) /* invalid EA1 */
1226 return -EINVAL;
1227 tei = skb->data[1] >> 1;
1228 if (tei > 63) /* not a fixed tei */
1229 return -ENOTCONN;
1230 if ((skb->data[2] & ~0x10) != SABME)
1231 return -ENOTCONN;
1232 /* We got a SABME for a fixed TEI */
1233 if (*debug & DEBUG_L2_CTRL)
1234 printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n",
1235 __func__, sapi, tei);
1236 l2 = create_new_tei(mgr, tei, sapi);
1237 if (!l2) {
1238 if (*debug & DEBUG_L2_CTRL)
1239 printk(KERN_DEBUG "%s: failed to create new tei\n",
1240 __func__);
1241 return -ENOMEM;
1242 }
1243 ret = l2->ch.send(&l2->ch, skb);
1244 return ret;
1245 }
1246
1247 void
1248 delete_teimanager(struct mISDNchannel *ch)
1249 {
1250 struct manager *mgr;
1251 struct layer2 *l2, *nl2;
1252
1253 mgr = container_of(ch, struct manager, ch);
1254 /* not locked lock is taken in release tei */
1255 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1256 mutex_lock(&mgr->ch.st->lmutex);
1257 list_del(&l2->ch.list);
1258 mutex_unlock(&mgr->ch.st->lmutex);
1259 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1260 }
1261 list_del(&mgr->ch.list);
1262 list_del(&mgr->bcast.list);
1263 skb_queue_purge(&mgr->sendq);
1264 kfree(mgr);
1265 }
1266
1267 static int
1268 mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1269 {
1270 struct manager *mgr;
1271 int ret = -EINVAL;
1272
1273 mgr = container_of(ch, struct manager, ch);
1274 if (*debug & DEBUG_L2_CTRL)
1275 printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg);
1276 switch (cmd) {
1277 case OPEN_CHANNEL:
1278 ret = create_teimgr(mgr, arg);
1279 break;
1280 case CLOSE_CHANNEL:
1281 ret = free_teimanager(mgr);
1282 break;
1283 case CONTROL_CHANNEL:
1284 ret = ctrl_teimanager(mgr, arg);
1285 break;
1286 case CHECK_DATA:
1287 ret = check_data(mgr, arg);
1288 break;
1289 }
1290 return ret;
1291 }
1292
1293 static int
1294 mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
1295 {
1296 struct manager *mgr = container_of(ch, struct manager, bcast);
1297 struct mISDNhead *hhc, *hh = mISDN_HEAD_P(skb);
1298 struct sk_buff *cskb = NULL;
1299 struct layer2 *l2;
1300 u_long flags;
1301 int ret;
1302
1303 read_lock_irqsave(&mgr->lock, flags);
1304 list_for_each_entry(l2, &mgr->layer2, list) {
1305 if ((hh->id & MISDN_ID_SAPI_MASK) ==
1306 (l2->ch.addr & MISDN_ID_SAPI_MASK)) {
1307 if (list_is_last(&l2->list, &mgr->layer2)) {
1308 cskb = skb;
1309 skb = NULL;
1310 } else {
1311 if (!cskb)
1312 cskb = skb_copy(skb, GFP_ATOMIC);
1313 }
1314 if (cskb) {
1315 hhc = mISDN_HEAD_P(cskb);
1316 /* save original header behind normal header */
1317 hhc++;
1318 *hhc = *hh;
1319 hhc--;
1320 hhc->prim = DL_INTERN_MSG;
1321 hhc->id = l2->ch.nr;
1322 ret = ch->st->own.recv(&ch->st->own, cskb);
1323 if (ret) {
1324 if (*debug & DEBUG_SEND_ERR)
1325 printk(KERN_DEBUG
1326 "%s ch%d prim(%x) addr(%x)"
1327 " err %d\n",
1328 __func__, l2->ch.nr,
1329 hh->prim, l2->ch.addr, ret);
1330 } else
1331 cskb = NULL;
1332 } else {
1333 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
1334 __func__, ch->nr, ch->addr);
1335 goto out;
1336 }
1337 }
1338 }
1339 out:
1340 read_unlock_irqrestore(&mgr->lock, flags);
1341 if (cskb)
1342 dev_kfree_skb(cskb);
1343 if (skb)
1344 dev_kfree_skb(skb);
1345 return 0;
1346 }
1347
1348 static int
1349 mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1350 {
1351
1352 return -EINVAL;
1353 }
1354
1355 int
1356 create_teimanager(struct mISDNdevice *dev)
1357 {
1358 struct manager *mgr;
1359
1360 mgr = kzalloc(sizeof(struct manager), GFP_KERNEL);
1361 if (!mgr)
1362 return -ENOMEM;
1363 INIT_LIST_HEAD(&mgr->layer2);
1364 rwlock_init(&mgr->lock);
1365 skb_queue_head_init(&mgr->sendq);
1366 mgr->nextid = 1;
1367 mgr->lastid = MISDN_ID_NONE;
1368 mgr->ch.send = mgr_send;
1369 mgr->ch.ctrl = mgr_ctrl;
1370 mgr->ch.st = dev->D.st;
1371 set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI);
1372 add_layer2(&mgr->ch, dev->D.st);
1373 mgr->bcast.send = mgr_bcast;
1374 mgr->bcast.ctrl = mgr_bcast_ctrl;
1375 mgr->bcast.st = dev->D.st;
1376 set_channel_address(&mgr->bcast, 0, GROUP_TEI);
1377 add_layer2(&mgr->bcast, dev->D.st);
1378 mgr->deact.debug = *debug & DEBUG_MANAGER;
1379 mgr->deact.userdata = mgr;
1380 mgr->deact.printdebug = da_debug;
1381 mgr->deact.fsm = &deactfsm;
1382 mgr->deact.state = ST_L1_DEACT;
1383 mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer);
1384 dev->teimgr = &mgr->ch;
1385 return 0;
1386 }
1387
1388 int TEIInit(u_int *deb)
1389 {
1390 int res;
1391 debug = deb;
1392 teifsmu.state_count = TEI_STATE_COUNT;
1393 teifsmu.event_count = TEI_EVENT_COUNT;
1394 teifsmu.strEvent = strTeiEvent;
1395 teifsmu.strState = strTeiState;
1396 res = mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser));
1397 if (res)
1398 goto error;
1399 teifsmn.state_count = TEI_STATE_COUNT;
1400 teifsmn.event_count = TEI_EVENT_COUNT;
1401 teifsmn.strEvent = strTeiEvent;
1402 teifsmn.strState = strTeiState;
1403 res = mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet));
1404 if (res)
1405 goto error_smn;
1406 deactfsm.state_count = DEACT_STATE_COUNT;
1407 deactfsm.event_count = DEACT_EVENT_COUNT;
1408 deactfsm.strEvent = strDeactEvent;
1409 deactfsm.strState = strDeactState;
1410 res = mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList));
1411 if (res)
1412 goto error_deact;
1413 return 0;
1414
1415 error_deact:
1416 mISDN_FsmFree(&teifsmn);
1417 error_smn:
1418 mISDN_FsmFree(&teifsmu);
1419 error:
1420 return res;
1421 }
1422
1423 void TEIFree(void)
1424 {
1425 mISDN_FsmFree(&teifsmu);
1426 mISDN_FsmFree(&teifsmn);
1427 mISDN_FsmFree(&deactfsm);
1428 }
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